ZIP code · Portola Valley · California · United States
ZIP code 94028 — Portola Valley
ZIP code 94028 serves Portola Valley, California.
- Postal code
- 94028Single source Value from one source, not cross-checked.
- City
- Portola Valley
- County
- San Mateo
- State
- California
- Country
- United States
- Coordinates
- 37.3702, -122.2182 — precision precise (locality)
View on OpenStreetMap - Population
- 6,645 (ZCTA, ACS 5-year)
- Median household income
- $250,001
- Median age
- 56.4
- Time zone
- America/Los_Angeles (UTC−8 / UTC−7 DST)
- Area code
- 530Telephone area codes serving this ZIP (NANPA central-office assignments). A ZIP and an area code are different boundaries; at a border both codes may apply.
About this page
US ZIP codes have five digits. They are postal routing areas, not administrative boundaries: a ZIP can span more than one city or county, and the city shown is the primary USPS name for that code.
GeoNames · U.S. Census Bureau (ACS). Data generated on 2026-08-21. Methodology · Report an error on this page